Draft-regulating device.



Na. 622,664. Paiented Emma 27, [899.

SHAFT EEGEMITEEE BEWEE.

(Application filed Kay 12, 1896.)

we Model.)

WU manna ished thereby;

4o ment f is LUDWIG HAI NZL, OF EUGERTSHAM, GERMANY.

DRA FT-=REGU LATING DEVICE.

srncrmca'rron forming part of Letters Patent No.

627,614, dated June 27, 1899.

Application filed May 12, 1896. Serial No. 591,249. (No model.)

To all whom it may concern.-

Be it known that I, Lnnwre HAINZL, a citizen of Bavaria, residing atEugertsham, avaria, Germany, have invented certain new 5 and usefulImprovements in Draft-Regulating Devices, (patented in Great Britain January 3, 1896, No. 230,) of which the following is a specification.

The present invention relates to draft re- 10 ducing or regulatingdevices for traction and other engines; and its object is to producesuch reduction or regulation of the draft when the steam in the boilerhas attained a certain maximum of tension.

With this object in view myinvention consists in means whereby suchmaximum tension causes the smoke-stack to be narrowed in cross-sectionor entirely closed by the water in the boiler, so that the draft isdiminand my invention, moreover, consists in such further means,features,'and combinations of parts as will be hereinafter set forth,and particularly pointed out in the claims. v

In the accompanying drawings 1' have shown, in vertical longitudinalsection, so much of a traction-engine embodying my invention as isnecessary to make the same understood by those skilled in the art towhich 0 it relates.

As will be noted by referring to said drawin g, a chamber between thesmoke-chest a and the smokest-ack b, the said chamber 0 being interiorlyarranged in the form of a siphon or li uid seal by two diaphragms d ande, the esca ing gases and products of combustion being thereby compelledto take a circuitous course. By these diaphragms or partitions acompartformed, with whose bottom two pipes gand h communicate. The pipeg also communicates with the water-space i of the boiler, a safety orautomatic valve 70 being arranged thereon within the smoke-chest a. 5The weight of the valve 7:, is so adjusted that said valve remainsclosed up to a certain amount of steam tension in the boiler, wherebythe connection between compartment and water-spaced is out OK. When,however,

the highest admissible steam tension is exceeded, the excess of pressurecauses the safet valve to open, thereby admitting water from the boilerto the compartment or enlargement c is interposed l The passage for theproducts'ofcombustion is thereby reduced, or it may even be entirelyclosed, so that the fire is damped or even egtinguished. When it againincrease the draft, the compartment f water in the may be entirely orpartly drained through drain-pipe h by opening the let-off cock Z. Toascertain the leyel of the water in the compartment or seal f, the pipeh is provided with a watergage m. The drain-pipe 7;. may open eitherinto or to the outside of the boiler.

Though I have hereinbefore described an automatic draft-reducer, thedevice embodying my invention may be so modified that the valve or cookk,'instead of opening automat ically when the tension reaches a'maximum,may be opened by hand at the proper time, whereby the water will beforced into the seal compartment f whenever the steam tension exceedsthe maximum, which generally occurs at times when the engine is inactive operation.

What I claim, ters Patent, is-- 1. The combination, with a smoke-stackof an engineboiler, a liquid-seal compartment, and a pipe leadingfrom'the boiler to thesaid compartment, of a valve or cook arranged inthe pipe, whereby, when the pressure in the valve is opened and water isforced into the seal= compartment to stantially as described.

, 2. The combination, with a smoke-stack of an en gine-boiler, aliquid-seal compartment, and a pipe leading from the boilerto the saidcompartment, of a valve or cock arranged in the pipe, whereby, when thepressure in the boiler exceeds a certain maxim-um, is opened and wateris forced into the scab compartment to check or stop the draft, and adrain-pipe connected to said compartment, whereby the water collected insaid compartment may be withdrawn to increase the draft, substantiallyas described.

1 In testimony that I claim the foregoing as my invention once of twosubscribing I have signed my name in preswitnesses. DWIG IIAINZL.Witnesses:

ALBERT WEICKMANN,

Rows MAYER- becomes desirable to" and desire to secure by Let the valve

